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Catalytic combustion catalyst containing manganese-cerium-titanium-hafnium composite oxide and preparation method and application of catalytic combustion catalyst

A composite oxide, catalytic combustion technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, combustion method, physical/chemical process catalyst, etc. To achieve the effect of easy large-scale industrial production, simple process, and easy sintering

Active Publication Date: 2018-06-29
普利飞尔环保科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent CN14884435A discloses a catalytic combustion catalyst and its preparation method. The catalyst has a high catalytic combustion conversion efficiency for organic waste gas, but needs to use a relatively high content of precious metal elements, and has high prices, poor anti-toxicity and widespread Disadvantages such as poor practical performance
Chinese patent CN106140175A discloses a preparation method for catalytic combustion of fluorine-containing and chlorine-containing catalysts to obtain non-noble metal composite oxide Co / La-CeO 2 An integral catalyst; the catalyst has the advantages of high temperature resistance, strong coating adhesion, good anti-toxicity and high catalytic activity to fluorine-containing and chlorine-containing VOCs, but it needs to use a variety of additives, and the preparation method is relatively Complicated and expensive to use

Method used

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  • Catalytic combustion catalyst containing manganese-cerium-titanium-hafnium composite oxide and preparation method and application of catalytic combustion catalyst
  • Catalytic combustion catalyst containing manganese-cerium-titanium-hafnium composite oxide and preparation method and application of catalytic combustion catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0031] This example provides a catalyst containing manganese-cerium-titanium-hafnium composite oxide, which is prepared by the following method:

[0032] (1) Place the cordierite honeycomb ceramic carrier in dilute nitric acid with a mass concentration of 5% and soak for 4 hours, then place it in an ultrasonic cleaner for cleaning for 4 hours, take it out and bake it at 90°C for 4 hours, and then bake it for 5 hours, Obtain the pretreated cordierite honeycomb ceramic carrier;

[0033] (2) Dissolve 64 grams of tetrabutyl titanate in absolute ethanol, slowly add a small amount of water, then add a certain amount of ethylenediamine, and stir magnetically for 1 hour to obtain a stable sol; dissolve 41 grams of hafnium oxychloride to 50 In milliliter formaldehyde solution, stir for 30 minutes to form a uniform solution; then slowly add the solution to the above-mentioned sol, and stir vigorously until the reaction is completed to form a translucent gel;

[0034] (3) 20 grams of Mn...

Embodiment 2

[0037] This example provides a catalyst containing manganese-cerium-titanium-hafnium composite oxide, which is prepared by the following method:

[0038] (1) Soak the cordierite honeycomb ceramic carrier in dilute nitric acid with a mass concentration of 7% for 4 hours, then place it in an ultrasonic cleaner for 3 hours, take it out and bake it at 100°C for 4 hours, and then bake it for 5 hours, Obtain the pretreated cordierite honeycomb ceramic carrier;

[0039] (2) Dissolve 64 grams of tetrabutyl titanate in absolute ethanol, slowly add a small amount of water, then add a certain amount of ethylenediamine, and stir magnetically for 1 hour to obtain a stable sol; dissolve 41 grams of hafnium oxychloride to 50 mL of formaldehyde solution and stirred for 30 minutes to form a homogeneous solution. Then slowly add the solution into the above-mentioned sol and stir vigorously until the reaction is completed to form a translucent gel;

[0040] (3) 25 grams of Mn(NO 3 ) 2 and 30...

Embodiment 3

[0043] This example provides a catalyst containing manganese-cerium-titanium-hafnium composite oxide, which is prepared by the following method:

[0044] (1) Place the cordierite honeycomb ceramic carrier in dilute nitric acid with a mass concentration of 8% for 3 hours, then place it in an ultrasonic cleaner for 3 hours, take it out and bake it at 110°C for 3 hours, and then bake it for 5 hours, Obtain the pretreated cordierite honeycomb ceramic carrier;

[0045] (2) Dissolve 64 grams of tetrabutyl titanate in absolute ethanol, slowly add a small amount of water, then add a certain amount of ethylenediamine, and stir magnetically for 1 hour to obtain a stable sol; dissolve 41 grams of hafnium oxychloride to 50 In milliliter formaldehyde solution, stir for 30 minutes to form a uniform solution; then slowly add the solution to the above-mentioned sol, and stir vigorously until the reaction is completed to form a translucent gel;

[0046] (3) 30 grams of Mn(NO 3 ) 2 (AR) and ...

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Abstract

The invention relates to a catalytic combustion catalyst containing manganese-cerium-titanium-hafnium composite oxide. The catalyst takes cordierite-based honeycomb ceramic as a carrier which is sequentially coated with a first metal oxide coating and a second metal oxide coating from inside to outside; the first metal oxide coating is prepared from titanium-hafnium oxide; and the second metal oxide coating is prepared from manganese oxide and cerium oxide. The catalyst provided by the invention has the advantages that by adopting non-noble metals for replacing noble metals, on the one hand, the defects of high price, poor poison resistance and the like of the noble metals are overcome, and on the other hand, the raw materials of the non-noble metals are easily available and the technologyis simple and convenient; and the catalyst provided by the invention is uniform in coating dispersion, active components and the carrier are tightly combined, the thermal stability is high, the catalytic activity is high, the service life is long, and large-scale industrial production is easy to realize.

Description

technical field [0001] The invention relates to the fields of air pollution control technology and environmental protection catalytic materials, in particular to a manganese-cerium-titanium-hafnium composite oxide catalyst and its preparation method and application. Background technique [0002] Volatile organic compounds (VOCs) are the main components of air pollutants, mainly produced in the petroleum refining industry and processing industries such as electronics, printing, coatings, and paints. A large amount of organic waste gas not only pollutes the environment, but also seriously endangers human health. With the improvement of people's requirements on the living environment, the effective treatment of this type of gas has attracted widespread attention. At present, the methods used to treat VOCs mainly include adsorption method, condensation method, and catalytic combustion method. Among them, catalytic combustion method has the advantages of high efficiency, low tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34F23G7/07
CPCB01J23/002B01J23/34B01J2523/00F23G7/07F23G2209/14B01J2523/3712B01J2523/47B01J2523/72B01J2523/49
Inventor 杨继新王征王俊超
Owner 普利飞尔环保科技(上海)有限公司
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